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Physics
UTME / JAMB 1978
Heat Energy & Temperature
An object is positioned between two plane mirrors inclined at right angles to each other. The object is 1 unit from each mirror. The number of images formed is
A
1
B
2
C
3
D
4
E
5
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Official Exam / Past Question Archive
Physics
UTME / JAMB 1978
Heat Energy & Temperature
Diagram
Solution
In The Diagram, what is the value of W
Attached Figure / Diagram
A
5N
B
10N
C
15N
D
20N
E
30N
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
W x 2 = 20 x 1
2W = 20
W = \(\frac{20}{2}\) = 10N
(the given diagram is incomplete)
Source: Myschool Past Questions Archive (Record #41593)
Physics
UTME / JAMB 1978
Heat Energy & Temperature
Diagram
Solution
The equivalent capacitance for the circuit drawn above is
Attached Figure / Diagram
A
18µf
B
4µf
C
2µf
D
12µf
E
13µf
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
capacitors 5microfarad and 7microfarad are parallel to each other, hence effective capacitance = 5 + 7 = 12microfarad
12microfarad and 6 microfarad are in series then effective capacitance =
\(\frac{1}{6} + \frac{1}{12}\)
= \(\frac{3}{12}\)
then effective capacitance = \(\frac{12}{3}\) = 4microfarad
Source: Myschool Past Questions Archive (Record #41594)